Can Only Load One PNG File

I'am trying to finish my first Java Game with the slick2D library. I had it all working in eclipse but when i was about to make a jar file of it i did realize that i had to use class loader to load my png - SpriteSheets. But now to the problem. My ResourceLoader Class looks like this:

public static InputStream load(String path){
InputStream input = MyResourceLoader.class.getResourceAsStream(path);
if(input==null){
input = MyResourceLoader.class.getResourceAsStream("/"+path);
}
return input;
}

My init-Method in the BasicGame class, where i try to load my png-files looks like this:

public void init(GameContainer arg0) throws SlickException {
InputStream inputStream1 = MyResourceLoader.load("images/piratR.png");
sprite1 = new SpriteSheet("",inputStream1,32,32);

InputStream inputStream2 = MyResourceLoader.load("images/monkey.png");
sprite2 = new SpriteSheet("",inputStream2,32,32);

animation1 = new Animation(sprite1,200);
animation2 = new Animation(sprite2,250);
}

And that works fine for loading the FIRST png-file(eg piratR.png), but whenever i try to load another file it just loads the first one again. So in this case sprite1 and sprite2 looks the same though there are different images.

When i switch the "Load order" and Load sprite2 before sprite1 both animations looks different, so I'm sure that i have two different pictures and its always the one that i load first that will get loaded to all the other SpriteSheets.